It seems like the blood type diet and personality analysis were only the beginning: now a new fragrance line matches a fragrance to each blood group.

Presented at the niche perfumery fair Esxence in Milan, which wrapped up April 3, Blood Concept will launch four unisex scents over the course of this year, all featuring metallic notes, the "actual smell of blood."

"B" is more woody and spicy, with red apple, black cherry, artemisia, pepper, pomegranate, black tea, patchouli, and tick wood all featuring in its composition. Finally, "AB" is a mineral composition of aldehydes, aluminum, slate, pebble, aqua, and cedar wood.

All four will come in medical-looking droppers. Prices have not yet been announced.

There seems to be a current fascination with blood in fragrance. Lady Gaga has said that, for her upcoming signature perfume, she took a "sample of my own blood and extracted the molecular structure scent of that and injected it into the perfume so that it would smell and feel like me." Niche label Etat Libre d'Orange sells a perfume called Sécrétions Magnifiques, inspired by body fluids.